NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 1206 - 1212 of 1258

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Passage

DIRECTIONS: Read the passage given below and answer the questions that follows:

When a cation approaches an anion closely, the positive charge of a cation attract the electron cloud of the anion towards itself, due to the electrostatic force of attraction between them. At the same time cation also repel the positively charge nucleus of anion.

Due to this combined effect, cloud of anion is bulged or elongated towards the cation. This is called distortion, deformation or Polarization of the anion by the cation and anion is called Polariability:

(I) Ability of anion to get polarised by the cation.

(II) Polarisation of anion causes some sharing of electron between the ions so ionic bond acquires certain covalent character.

(III) Polarisation is of covalent character

(IV) Magnitude of polarisation depends upon a no. of factors, suggested by Fajan and are known as Fajan’s rule.

Question number: 1206 (1 of 3 Based on Passage) Show Passage

» Chemical Bonding » Ionic and Covalent Bonds

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MCQ▾

Question

Compound having highest melting point.

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1207 (2 of 3 Based on Passage) Show Passage

» Chemical Bonding » Ionic Bonding » Formation of Ionic Bonds

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MCQ▾

Question

Compound with maximum ionic character is formed from

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1208 (3 of 3 Based on Passage) Show Passage

» Chemical Bonding » Ionic and Covalent Bonds

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MCQ▾

Question

Out of the following which one has the highest values of covalent character?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1209

» Atomic Structure » Electronic Configuration of Elements

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MCQ▾

Question

Which follows octet rule?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1210

» Atomic Structure » Quantum Mechanical Model of Atom

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MCQ▾

Question

and both molecules are covalent, but is non-polar and is polar. Its reason is

Choices

Choice (4) Response

a.

is planar whereas is pyramidal

b.

In uncombined state boron is metal and nitrogen is gas

c.

The size of boron atom is smaller than nitrogen

d.

Bond has no dipole moment whereas bond has dipole moment

Question number: 1211

» Chemical Bonding » Ionic Bonding » Factors Affecting the Formation of Ionic Bonds

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MCQ▾

Question

Polarisibility of halide ions increase in the order

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1212

» States of Matter » Classification of Matter

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Assertion-Reason▾

Question

Assertion (Ꭺ)

Order of lattice energy for somehalide is as .

Reason (Ꭱ)

Size of alkaline metal decreases for .

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are false